<template>
  <div>
    <div class="user-info-head" @click="editCropper()"><img v-bind:src="options.img" title="点击上传头像"
                                                            class="img-circle img-lg"/></div>
    <el-dialog :title="title" v-model="open" width="800px" append-to-body @opened="modalOpened"
               @close="closeDialog">
      <el-row>
        <el-col :xs="24" :md="12" :style="{height: '350px'}">
          <vue-cropper
            ref="cropper"
            :img="options.img"
            :info="true"
            :autoCrop="options.autoCrop"
            :autoCropWidth="options.autoCropWidth"
            :autoCropHeight="options.autoCropHeight"
            :fixedBox="options.fixedBox"
            :outputType="options.outputType"
            @realTime="realTime"
            v-if="visible"
          />
        </el-col>
        <el-col :xs="24" :md="12" :style="{height: '350px'}">
          <div class="avatar-upload-preview">
            <img :src="previews.url" :style="previews.img"/>
          </div>
        </el-col>
      </el-row>
      <br/>
      <el-row>
        <el-col :lg="2" :sm="3" :xs="3">
          <el-upload action="#" :http-request="requestUpload" :show-file-list="false" :before-upload="beforeUpload">
            <el-button size="small">
              选择
              <i class="el-icon-upload el-icon--right"></i>
            </el-button>
          </el-upload>
        </el-col>
        <el-col :lg="{span: 1, offset: 2}" :sm="2" :xs="2">
          <el-button size="small" @click="changeScale(1)">
            <el-icon>
              <plus/>
            </el-icon>
          </el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}" :sm="2" :xs="2">
          <el-button size="small" @click="changeScale(-1)">
            <el-icon>
              <minus/>
            </el-icon>
          </el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}" :sm="2" :xs="2">
          <el-button size="small" @click="rotateLeft()">
            <el-icon>
              <refresh-left/>
            </el-icon>
          </el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}" :sm="2" :xs="2">
          <el-button size="small" @click="rotateRight()">
            <el-icon>
              <refresh-right/>
            </el-icon>
          </el-button>
        </el-col>
        <el-col :lg="{span: 2, offset: 6}" :sm="2" :xs="2">
          <el-button type="primary" size="small" @click="uploadImg()">提 交</el-button>
        </el-col>
      </el-row>
    </el-dialog>
  </div>
</template>


<script setup lang="js">
import {VueCropper} from "vue-cropper";
import 'vue-cropper/dist/index.css'
import UserAPI from "@/api/user"
import {debounce} from '@/utils'
import {useUserStore, useUserStoreHook} from "@/store/index";

const userStore = useUserStore();

// 是否显示弹出层
const open = ref(false)
// 是否显示cropper
const visible = ref(false)
// 弹出层标题
const title = ref("修改头像")
const options = reactive({
  img: "/" + userStore.user.avatar,  //裁剪图片的地址
  autoCrop: true,             // 是否默认生成截图框
  autoCropWidth: 200,         // 默认生成截图框宽度
  autoCropHeight: 200,        // 默认生成截图框高度
  fixedBox: true,             // 固定截图框大小 不允许改变
  outputType: "png",           // 默认生成截图为PNG格式
  filename: 'avatar'          // 文件名称
})
const previews = ref({})
const resizeHandler = ref(null)

// 编辑头像
function editCropper() {
  open.value = true;
}

// 打开弹出层结束时的回调
function modalOpened() {
  visible.value = true;
  if (!resizeHandler.value) {
    resizeHandler.value = debounce(() => {
      refresh()
    }, 100)
  }
  window.addEventListener("resize", resizeHandler.value)
}

const cropper = ref(null)

// 刷新组件
function refresh() {
  cropper.value.refresh();
}

// 覆盖默认的上传行为
function requestUpload() {
}

// 向左旋转
function rotateLeft() {
  cropper.value.rotateLeft();
}

// 向右旋转
function rotateRight() {
  cropper.value.rotateRight();
}

// 图片缩放
function changeScale(num) {
  num = num || 1;
  cropper.value.changeScale(num);
}

// 上传预处理
function beforeUpload(file) {
  if (file.type.indexOf("image/") == -1) {
    ElMessage.error("文件格式错误，请上传图片类型,如：JPG，PNG后缀的文件。");
  } else {
    const reader = new FileReader();
    reader.readAsDataURL(file);
    reader.onload = () => {
      options.img = reader.result;
      options.filename = file.name;
    };
  }
}

// 上传图片
function uploadImg() {
  cropper.value.getCropBlob(data => {
    let formData = new FormData();
    formData.append("avatarfile", data, options.filename);
    UserAPI.uploadAvatar(formData).then(response => {
      open.value = false;
      options.img = import.meta.env.VITE_APP_BASE_API +"/"+ response.path;
      useUserStoreHook().setUserAvatarAction(options.img)
      ElMessage.success("修改成功");
      visible.value = false;
    });
  });
}

// 实时预览
function realTime(data) {
  previews.value = data;
}

// 关闭窗口
function closeDialog() {
  options.img = userStore.user.avatar
  visible.value = false;
  window.removeEventListener("resize", resizeHandler)
}

//   }
// };
</script>
<style scoped lang="scss">
.avatar-upload-preview {
  position: relative;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 200px;
  height: 200px;
  border-radius: 50%;
  box-shadow: 0 0 4px #ccc;
  overflow: hidden;
}
$prefix-cls: #{$namespace}--cropper-avatar;

.#{$prefix-cls} {
  display: inline-block;
  text-align: center;

  &-image-wrapper {
    overflow: hidden;
    cursor: pointer;
    border: 1px solid;
    border-radius: 50%;

    img {
      width: 100%;
    }
  }

  &-image-mask {
    position: absolute;
    width: inherit;
    height: inherit;
    cursor: pointer;
    background: rgb(0 0 0 / 40%);
    border: inherit;
    border-radius: inherit;
    opacity: 0;
    transition: opacity 0.4s;

    ::v-deep(svg) {
      margin: auto;
    }
  }

  &-image-mask:hover {
    opacity: 40;
  }

  &-upload-btn {
    margin: 10px auto;
  }
}

.user-info-head {
  position: relative;
  display: inline-block;
}

.img-circle {
  border-radius: 50%;
}

.img-lg {
  width: 120px;
  height: 120px;
}

.user-info-head:hover::after {
  position: absolute;
  inset: 0;
  font-size: 24px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-style: normal;
  line-height: 110px;
  color: #eee;
  cursor: pointer;
  background: rgb(0 0 0 / 50%);
  border-radius: 50%;
  content: '+';
}
</style>
